Sear and bolt mechanism for single-shot firearms



' Jan. 27, 1948. E. G. REISING 2,435,184

SEAR AND BOLT MECHANISM FOR SINGLE SHOT FIREARMS Filed May 7, 1945 I INVEN TOR.

E -395M: GREIsING Patented Jan. 27, 1948 UNITED STATE sEAR AND-BOLTMECHANISM FoR SINGLE-SHOT FIREARMS Eugene Reising, Hartford, Conn.Application y a, 1945, Serial No. 592,302

2 Claims. 1

This invention relates to bolt-action firearms and more particularly tothe sear and bolt mechanism thereof.

Objects of the invention include the provision of a hand-operated boltlocated for reciprocation and rotation in a receiver to eject a spentshell and. to cock the firing pin, the latter being located in the bolt,in combination with a sear normally locked by a trigger in position tohold the firing pin cocked, the sear nose being yieldingly located in aslot in the bottom of the bolt, and being depressed by means of thefiring pin spring when the trigger is pressed, the bolt slot terminatingin an angular abutment adjacent its forward end so that the sear stopsthe bolt in its retractive movement unless the trigger is simultaneouslypressed to unlock the scar and thus provide for depression of the latterby the angular abutment acting as a cam.

Further objects of the invention include the provision of a pivoted searhaving a spring normally projecting a nose portion of the sear into thepath of a firing pin and of the bolt to both hold the firing pin cockedand to act as a bolt stop, the sear being locked in this position by thetrigger, so that as the trigger is pressed, the firing pin spring isenabled. to depress the sear to fire the weapon, but the bolt cannot beremoved unless it is retracted and the trigger pressed at the same time,since the sear is always locked by the trigger in raised position exceptwhen the trigger is pressed.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which Fig. 1 is alongitudinal section through a firearm illustrating the invention;

Fig. 2 is a view similar to Fig. 1 but showing the parts in a differentposition; and

Fig. 3 is a diagrammatic view showing the action of the bolt on thesear.

The firearm illustrating the present invention is shown as having a'receiver with a barrel l2 secured thereto and a hand-operated bolt 14therein. The bolt is provided with a firing pin I 6 having dependinglugs 18 and IS with a rotary cocking cam 20 located therebetween to cockthe firing pin by bearing on the rear lug l9 against the action of thefiring pin spring 2|. The firing pin reciprocates in a longitudinalopening 22 in the bolt between firing and cocked positions, and a slot24 opens to the bottom of the bolt and terminates adjacent the forwardend of the bolt in an inclined abutment or shoulder 26.

A stud 28 depends from the receiver and pivotally mounts a sear 30thereon. A sear spring 32 urges the sear in a counterclockwise directionso that normally the sear nose 34 extends upwardly into slot 24 in thebolt. The rear face of the sear nose is substantially vertical but thefront face 3% is inclined to a slightly less degree than the inclinedabutment 28, as clearly shown in Fig. 3. The Fig. 1 disclosure shows theparts in cocked condition, and due to the sear spring this is the normalcondition of the sear.

The sear is provided with a stop 38 and a looking notch 40, the latterreceiving the nose 42 of a trigger 44 mounted on a stud 46. A triggerspring 48 constantly urges the trigger in a counterclockwise directionso that the trigger always automatically locks the sear in raisedposition as shown in Fig. 1, and the only time the sear is unlocked iswhen the trigger is pressed.

With the parts cocked, as in Fig. 1, the trigger is pressed releasingthe sear which is depressed or turned clockwise by the pressure of thefiring pin spring 2| through the mediary of the forward lug l8 pressingon the vertical rear face of the sear nose 34, whereupon the piece isfired. The firing pin is cocked by rotating the cooking cam 20 and thespent shell is extracted by retraction of the bolt in the usual manner.The sear has now been returned to raised position by its spring 32 andit is automatically locked by the trigger nose 42 if the finger hasreleased the trigger, as

must be the case as the bolt is worked by the right hand of the shooter.Hence the sear stops the retractive motion of the bolt by engagement ofabutment 26 on the inclined front face 36 of the sear nose.

However, if it is desired to remove the bolt, th trigger is pressed asthe bolt is withdrawn thus releasing the sear and leaving the latterfree to be cammed down by the abutment at 26 to release the bolt.

Fig. 3 shows the slight difierence in angularity of surfaces 26 and 36and it will be observed that the lowermost point of the abutment 26strikes the inclined face 36 of the sear nose, this easing the actionwhich would be otherwise difficult due to the line of force reactionfrom the abutment through the pivot pin 58' of the sear.

The above described construction provides an inexpensive and easilyoperable bolt action for firearms which utilizes the sear as a bolt stopwithout the extra parts usually necessary for this purpose, and it ispointed out that the sear does double duty, acting as sear for thefiring pin and as a bolt stop in a simple manner.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is:

1. A bolt-action firearm comprising a receiver, a hand-operated bolttherein, a firing pin, a sear, said sear having a nose provided with arear firing pin stoppingface and .aliorwardsinclined face, said bolthaving a slot receiving theesear nose, said slot terminating in aninclined abutment adjacent the forward end of the bolt for engagementwith the inclined sear nose face to cam the sear out of the slot, anda-trigger= normally locking the sear with the sear nosedn-"the bolt.slot, said trigger being actuatable -to releasetthe sear, and yieldingmeans to urge the sear to bolt stopping position.

2. The firearm of claim 1 wherein the inclined abutment is at a greaterangle to the line of bolt movement than the inclined sear nose face.

EUGENE G. REISING.

REFERENCES CITED The following references are of record in the ,file ofithis patent:

"UNITED STATES PATENTS

